package com.itrip.auth.service.impl;


import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itrip.auth.entity.User;
import com.itrip.auth.mapper.UserMapper;
import com.itrip.auth.service.UserService;
import org.springframework.stereotype.Service;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.List;

/**
 * <p>
 * 用户表 服务实现类
 * </p>
 *
 * @author 周勉
 * @since 2020-02-28
 */
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements UserService {

    @Override
    public User login(User user) {
        QueryWrapper<User> queryWrapper = new QueryWrapper<>();
        //进行MD5加密
        String pwd = string2MD5(user.getUserPassword());
        System.out.println(pwd);
        //参数传递
        queryWrapper.eq("user_code", user.getUserCode()).eq("user_password", pwd);
        User listuser = baseMapper.selectOne(queryWrapper);
        if (listuser != null) {
            return listuser;
        }
        return null;
    }

    /**
     * MD5加密
     * @param inStr
     * @return
     */
    public static String string2MD5(String inStr) {
        MessageDigest md5 = null;
        try {
            md5 = MessageDigest.getInstance("MD5");
        } catch (Exception e) {
            System.out.println(e.toString());
            e.printStackTrace();
            return "";
        }
        char[] charArray = inStr.toCharArray();
        byte[] byteArray = new byte[charArray.length];

        for (int i = 0; i < charArray.length; i++)
            byteArray[i] = (byte) charArray[i];
        byte[] md5Bytes = md5.digest(byteArray);
        StringBuffer hexValue = new StringBuffer();
        for (int i = 0; i < md5Bytes.length; i++) {
            int val = ((int) md5Bytes[i]) & 0xff;
            if (val < 16)
                hexValue.append("0");
            hexValue.append(Integer.toHexString(val));
        }
        return hexValue.toString();
    }

    /**
     * MD5运行一次加密两次解密
     * @param inStr
     * @return
     */
    public static String convertMD5(String inStr) {
        char[] a = inStr.toCharArray();
        for (int i = 0; i < a.length; i++) {
            a[i] = (char) (a[i] ^ 't');
        }
        String s = new String(a);
        return s;

    }
}

